Systems and methods for positioning fluid supply system

ABSTRACT

Fluid supply systems and methods for therapeutic fluid delivery systems, including those used for negative pressure wound therapy (NPWT) systems and methods.

CROSS-REFERENCE TO RELATED APPLICATION

This application is a Continuation of U.S. patent application Ser. No.14/801,493, filed on Jul. 16, 2015, which is a Continuation of U.S.patent application Ser. No. 13/870,873, filed on Apr. 25, 2013, now U.S.Pat. No. 9,107,998, which is a Divisional Application of U.S. patentapplication Ser. No. 13/014,482, filed on Jan. 26, 2011, now U.S. Pat.No. 8,449,502, which claims priority to U.S. Provisional PatentApplication Ser. No. 61/299,744, filed Jan. 29, 2010, and entitled“Systems and Methods for Positioning Fluid Supply System.” Eachapplication set forth above is incorporated by reference herein for allpurposes.

BACKGROUND 1. Field of the Invention

The present invention relates generally to positioning a fluid supplysystem. More particularly, but not by way of limitation, the presentinvention relates to systems and methods for positioning a fluid supplysystem proximal to a therapeutic fluid delivery system used inconjunction with a negative pressure wound therapy (NPWT) system.

2. Background Information

Clinical studies and practice have shown that providing a reducedpressure in proximity to a tissue site augments and accelerates thegrowth of new tissue at the tissue site. The applications of thisphenomenon are numerous, but application of reduced pressure has beenparticularly successful in treating wounds. This treatment (frequentlyreferred to in the medical community as “negative pressure woundtherapy,” “reduced pressure therapy,” or “vacuum therapy”) provides anumber of benefits, including faster healing and increased formulationof granulation tissue. Typically, reduced pressure is applied to tissuethrough a wound insert (e.g., a porous pad or other manifold device).The wound insert typically contains cells or pores that are capable ofdistributing reduced pressure to the tissue and channeling fluids thatare drawn from the tissue. The wound insert can be incorporated into awound dressing having other components that facilitate treatment, suchas, for example, a drape (e.g., adhesive surgical drape). Instillationof fluids (e.g., irrigation fluids and/or medicaments) may be used inconjunction with negative pressure wound therapy to promote healingand/or improve efficacy.

In addition, the delivery of therapeutic fluids (e.g. saline orantibiotic fluids) to the wound insert can also provide benefits. Theconnection and positioning of such fluid supply and delivery systems canbe challenging. In certain instances, the fluids can be located on aseparate IV support, but this requires the unit to be located either onor near the support. This may present logistical issues if there is notsufficient room around the patient. If the unit is also supposed to beportable then these support methods can have a negative impact on thisaspect of use.

In addition, there are various connection methods, from cartridges tobasic tube routing systems that are currently used on fluid deliverypumps. Many existing systems have limiting factors on the type of fluidcontainer that can be used with the system. For example, many cartridgesystems specify a specific configuration for a fluid container or anexpensive tube set for that system, leading to cost issues as well aslimiting flexibility for the user in the type of fluid to be instilled.

Furthermore, securing different sized fluid containers can also presentproblems on portable products. Unwanted shifting of the fluid containercan lead to kinks or disconnections. For NPWT systems, this can lead toleaks and blockage alarms, or potentially a continued break in therapy.

SUMMARY

The present disclosure includes embodiments of fluid supply systems andcoupling such systems to therapeutic fluid delivery systems.

Certain embodiments comprise a cartridge for attachment to a fluiddelivery system. In specific embodiments, the cartridge may comprise: apiercing device having a conduit, the piercing device being for piercinga liquid container and creating a fluid communication between theinterior of the container and the conduit, the conduit having an outletconnection. In particular embodiments, the conduit may comprise a pumpcomponent actuated by a fluid delivery system to which the cartridge iscoupled for pumping liquid from the interior of a container to theoutlet connection.

In certain embodiments, the pump component may be a flexible conduitwhich forms a peristaltic pump upon connection to a fluid deliverysystem having a peristaltic pump actuator. In certain embodiments, thepump component may be a diaphragm pump configured to be actuated by anactuator of a fluid delivery system to which the cartridge is coupled.

Particular embodiments may further comprise a support device forsupporting the liquid container. In certain embodiments, the piercingdevice may be configured to be attached to the support device such thata container placed in the support device is pierced by the piercingdevice. In specific embodiments, the conduit may comprise: a firstcoupling from the piercing device to the pump component; and a secondcoupling from the pump component to the outlet connection. In particularembodiments, the pump component may be a flexible conduit between thefirst and second couplings.

In certain embodiments, the piercing device may comprise a vent valve.Particular embodiments may comprise a fluid delivery system forconnecting to a cartridge, where the fluid delivery system comprises anactuator for actuating the pump component of the cartridge. In specificembodiments, the actuator may comprise a rotor to engage the conduit ofa cartridge to form a peristaltic pump. Specific embodiments maycomprise a fluid delivery system, where the actuator comprises apush/pull actuator to actuate a diaphragm pump of a cartridge.

Certain embodiments comprise a fluid supply system comprising a supportdevice configured to support a liquid container. The support device maycomprise a base portion with a first lateral extension and a secondlateral extension extending from the base portion, and a slot betweenthe first lateral extension and the second lateral extension. The fluidsupply system may also comprise a cartridge coupled to the supportdevice, where the cartridge is configured to engage a fluid deliverysystem. In certain embodiments, the cartridge may comprise a housingcomprising a first end and a second end, and a first coupling memberproximal to the first end and a second coupling member proximal to thesecond end. Specific embodiments may comprise a piercing device coupledto a retaining member, where the retaining member is configured toengage the slot of the support device. Certain embodiments may alsocomprise a conduit coupled to the piercing device and the first couplingmember, where the piercing device and the first coupling member are influid communication.

In certain embodiments, the first lateral extension and the secondlateral extension may form a receptacle, and the piercing device mayextend into the receptacle when the retaining member is engaged with theslot. Particular embodiments may also comprise a liquid containerconfigured for insertion into the receptacle of the support device. Incertain embodiments, the piercing device may be configured to pierce theliquid container when the liquid container is inserted into thereceptacle of the support device. In specific embodiments, an upperportion of the liquid container may comprise a support engagementmember.

In particular embodiments, the support engagement member may comprise anextension and an aperture. In certain embodiments, the supportengagement member may be configured to engage a support member coupledto a therapeutic fluid delivery system. In particular embodiments, thefirst lateral extension and the second lateral extension of the supportdevice may be curved and tapered. In specific embodiments, the fluidsupply system may be coupled to a therapeutic fluid delivery systemcomprising a control housing having a lower support surface, and theslot may be positioned above the lower support surface. In certainembodiments, the conduit coupled to the piercing device may not beoccluded when the retaining member is engaged with the slot and when thelower support surface of the control housing is placed on a flatsurface.

Particular embodiments may also comprise a conduit coupled to the firstand second coupling members. In certain embodiments, the conduit may beconfigured to engage a pump when the fluid supply system is coupled to atherapeutic fluid delivery system. In specific embodiments, the pump maybe a peristaltic pump. In particular embodiments, the cartridge and thesupport device are integral components. In certain embodiments, thecartridge and the support device may be separate components.

Specific embodiments may also comprise a method of securing a liquidcontainer in fluid communication with a therapeutic fluid deliverysystem. In particular embodiments, the method may comprise: providing asupport device comprising a receptacle configured to receive the liquidcontainer and providing a cartridge coupled to the support device, wherethe cartridge is configured to engage the therapeutic fluid deliverysystem. In certain embodiments the cartridge may comprise a piercingdevice, and the method may include engaging the piercing device with thesupport device so that the piercing device extends into the receptacle.The method may also include placing the liquid container in thereceptacle of the support device, and piercing the liquid container withthe piercing device.

In specific embodiments, the cartridge may comprise a housing having afirst end and a second end the cartridge may comprise a first couplingmember proximal to the first end and a second coupling member proximalto the second end, and the piercing device may be coupled to a conduitin fluid communication with the first coupling member. In particularembodiments, the support device may comprise a slot, the piercing devicemay be coupled to a retaining member, and the retaining member may beengaged with the slot of the support device when the piercing memberextends into the receptacle.

In certain embodiments, the support device may comprise a base portionwith a first lateral extension and a second lateral extension extendingfrom the base portion, and the liquid container may be placed betweenthe base portion, the first lateral extension and the second lateralextension when the liquid container is placed in the receptacle. Inparticular embodiments, an upper portion of the liquid container maycomprise a support engagement member, and the therapeutic fluid deliverysystem may comprise a support member. Specific embodiments of themmethod may comprise engaging the support engagement member of the liquidcontainer with the support member of the therapeutic fluid deliverysystem.

Certain embodiments may comprise a method of securing a liquid containerin fluid communication with a therapeutic fluid delivery system.

Any embodiment of any of the present systems and/or methods can consistof or consist essentially of—rather thancomprise/include/contain/have—any of the described steps, elements,and/or features. Thus, in any of the claims, the term “consisting of” or“consisting essentially of” can be substituted for any of the open-endedlinking verbs recited above, in order to change the scope of a givenclaim from what it would otherwise be using the open-ended linking verb.

Details associated with the embodiments described above and others arepresented below.

BRIEF DESCRIPTION OF THE DRAWINGS

The following drawings illustrate by way of example and not limitation.For the sake of brevity and clarity, every feature of a given structureis not always labeled in every figure in which that structure appears.Identical reference numbers do not necessarily indicate an identicalstructure. Rather, the same reference number may be used to indicate asimilar feature or a feature with similar functionality, as maynon-identical reference numbers.

FIG. 1A depicts a perspective view of a pump-engagement cartridgeaccording to an exemplary embodiment.

FIG. 1B depicts a partial schematic side view of the pump-engagementcartridge coupled to a pump.

FIG. 2 depicts a perspective view of a support device for a liquidcontainer according to an exemplary embodiment.

FIG. 3 depicts a perspective view of the pump-engagement cartridge ofFIG. 1A coupled to the support device of FIG. 2.

FIG. 4 depicts a fluid container coupled to the pump-engagementcartridge of FIG. 1A and the support device of FIG. 2.

FIG. 5 depicts the assembly of FIG. 4 coupled to a therapeutic fluiddelivery system.

DESCRIPTION OF ILLUSTRATIVE EMBODIMENTS

The term “coupled” is defined as connected, although not necessarilydirectly, and not necessarily mechanically; two items that are “coupled”may be integral with each other. The terms “a” and “an” are defined asone or more unless this disclosure explicitly requires otherwise. Theterms “substantially,” “approximately,” and “about” are defined aslargely but not necessarily wholly what is specified, as understood by aperson of ordinary skill in the art.

The terms “comprise” (and any form of comprise, such as “comprises” and“comprising”), “have” (and any form of have, such as “has” and“having”), “include” (and any form of include, such as “includes” and“including”) and “contain” (and any form of contain, such as “contains”and “containing”) are open-ended linking verbs. As a result, a methodthat “comprises,” “has,” “includes” or “contains” one or more stepspossesses those one or more steps, but is not limited to possessing onlythose one or more steps. Likewise, a connection pad that “comprises,”“has,” “includes” or “contains” one or more elements possesses those oneor more elements, but is not limited to possessing only those elements.For example, in a connection pad that comprises a fluid-deliveryconnection and a pressure-sensor connection, the connection pad includesthe specified elements but is not limited to having only those elements.For example, such a connection pad could also include a vacuumconnection.

Further, a device or structure that is configured in a certain way isconfigured in at least that way, but it can also be configured in otherways than those specifically described.

Referring now to the drawings, and more particularly to FIGS. 1A and 1B,one example of a pump-engagement cartridge 10 comprises a housing 11, apiercing device 12, and a conduit 13 coupled to piercing device 12. Inthe embodiment shown, housing 11 further comprise a recessed portion 14located between a pair of conduit coupling members 15 and 16 proximal tofirst and second ends 25 and 26, respectively. A conduit 20 (e.g.,flexible tubing) can extend between conduit coupling members 15, 16 andacross recessed portion 14. As explained in more detail below,pump-engagement cartridge 10 may engage a therapeutic fluid deliverysystem so that the conduit between coupling members 15, 16 engages apump (e.g., a peristaltic or diaphragm pump) to provide delivery of atherapeutic fluid.

In the partial schematic side view shown in FIG. 1B, pump engagementcartridge 10 is shown coupled to a therapeutic fluid delivery system 70comprising a peristaltic pump 76. In this embodiment, peristaltic pump76 comprises an actuation member or rotor 77 configured to engageconduit 20 in recess 14. In certain embodiments, conduit 20 may belocated in a track or groove extending across recess 14. As rotor 77rotates and engages conduit 20, fluid is pumped from coupling member 15through conduit 20 and to coupling member 16. As explained in moredetail below, coupling member 15 is in fluid communication with conduit13, which can be placed in fluid communication with a fluid container.This configuration can allow peristaltic pump 76 to pump fluid from afluid container coupled to pump engagement cartridge 10.

Referring now to FIGS. 2-4, one example of a support device 30configured to support a liquid container 50 is shown coupled topump-engagement cartridge 10. FIG. 3 illustrates pump-engagementcartridge 10 and support device 30 coupled together to form a fluidsupply system 60, while FIG. 4 shows liquid container 50 placed insupport device 30.

As shown in FIGS. 2-4, support device 30 comprises a receptacle 31configured to receive liquid container 50. In the embodiment shown,receptacle 31 is formed by a pair of lateral extensions 32, 33 thatextend from a base portion 34. Lateral extensions 32, 33 are curved andtapered to accommodate a variety of sizes and shapes of liquid container50. In this embodiment, lateral extensions 32, 33 are configured toprovide a gap or slot 35. In the embodiment shown, support device 30also comprises an extension 36 that extends generally vertical (whensupport device is positioned during use). As shown in FIGS. 3 and 4,extension 36 may be coupled to an upper portion of pump-engagementcartridge 10 and can provide additional support for liquid container 50.

As shown in the exemplary embodiment of FIG. 1A, piercing device 12 iscoupled to a retaining member 17 configured to engage slot 35. In theembodiment shown, retaining member 17 comprises a plurality of flexibleribs 18 that provide a positive engagement for a friction fit betweenretaining member 17 and slot 35. In addition, a vent valve 19 may becoupled to piercing device 12 to allow a user to vent liquid container50 (if needed) as it is emptied of fluid. In exemplary embodiments,piercing device 12 may comprise an elongated body with a point or taperat an end distal to retaining member 17. During use, retaining member 17can be inserted into slot 35 so that piercing device 12 extends upwardfrom slot 35. This arrangement provides for piercing device 12 to extendinto receptacle 31 so that when liquid container 50 is inserted intoreceptacle 31, piercing device 12 can pierce liquid container 50.Alternatively, piercing device can be inserted into liquid container 50prior to engaging retaining member 17 with slot 35.

As shown in FIG. 3, pump-engagement cartridge 10 and support device 30can be coupled together to form a fluid supply system 60. As shown inFIGS. 4 and 5, liquid container 50 can be placed in support device 30.With this arrangement, fluid from liquid container 50 can pass throughpiercing device 12 (which comprises an internal conduit), conduit 13,coupling members 15, 16, and conduit 20. As shown in FIG. 5, fluidsupply system 60 can be coupled to therapeutic fluid delivery system 70.In certain embodiments, therapeutic fluid delivery system 70 comprises apump and control system configured to administer a therapeutic fluidfrom fluid supply system 60. In specific embodiments, therapeuticdelivery system 70 may comprise a peristaltic pump that engages conduit20 between coupling members 15, 16. In certain embodiments, therapeuticfluid delivery system 70 may be configured to deliver fluid to anegative pressure wound treatment (NPWT) system. In other embodiments,therapeutic fluid delivery system 70 may be configured to deliver fluidto other systems, including for example, those designed to administerfluids intravenously.

Fluid supply system 60 provides numerous benefits as compared toprevious fluid supply systems. For example, fluid supply system 60allows for liquid container 50 to be kept in close proximity totherapeutic fluid delivery system 70. Referring now to FIG. 4, liquidcontainer 50 comprises a support engagement member 51 with an extension52 and an aperture 53. As shown in FIG. 5, support engagement member 51is configured to engage a support member 71 having a hook 72 and ahandle 73. In certain embodiments, handle 73 can be extended upwardly(from the position shown in FIG. 5). Such a configuration can allow forsupport member 71 to support fluid containers of different lengths.Support member 71 and support device 30 can provide a stable support forthe upper portion of liquid container 50.

Furthermore, support device 30 is configured to accept fluid containersof various sizes and shapes, including for example, fluid containersranging from 250 ml to 1,000 ml. The curved and tapered shape of lateralextensions 32, 33 allow support device 30 to support a fluid containerat different locations within receptacle 31. For example, a smallerfluid container may be supported at a lower position within receptacle31 because the fluid container would enter receptacle 31 a greaterdistance before it engages lateral extensions 32, 33. A larger containermay be supported at a higher position within receptacle 31 because itwould engage lateral extensions 32, 33 sooner than a smaller fluidcontainer. The engagement of piercing device 12 with a fluid container,along with the engagement of retaining member 17 with slot 35 canstabilize the lower portion of a fluid container inserted intoreceptacle 31. In addition, the engagement of support member 71 andsupport engagement member 51 provides stability to the upper portion ofthe fluid container. These features allow a user to utilize differenttypes of fluid containers and does not require fluid containersspecifically designed for this fluid supply system. Such specializedcontainers can often increase the costs associated with fluid supplysystems.

In addition, fluid supply system and therapeutic fluid delivery system70 are configured so that the systems may be supported by a flat surfacewithout kinking or pinching conduit 13. As shown in FIG. 5, therapeuticfluid delivery system 70 comprises a control unit housing 74 having alower surface 75 that can be used to support therapeutic fluid deliverysystem 70 when placed on a flat surface. In this embodiment, retainingmember 17 (which is coupled to conduit 13) is located above lowersurface 75 of control unit housing 74. This configuration allowstherapeutic fluid delivery system 70 to be supported on a flat surfacewithout causing conduit 13 to become occluded (e.g., pinched or kinked)under components such as control unit housing 74 or retaining member 17.

The various illustrative embodiments of devices, systems, and methodsdescribed herein are not intended to be limited to the particular formsdisclosed. Rather, they include all modifications and alternativesfalling within the scope of the claims. For example, the support devicemay be integrated with a side cover coupled to the therapeutic fluiddelivery system. Such an a configuration can assist in accommodatinglarger bottles. The side cover can also be used to protect the deliverymechanism when not in use or during storage. In addition, certainembodiments may utilize spring-loaded straps around the fluid containerto assist in securing the fluid container within the receptacle of thesupport device. Furthermore, certain embodiments may not comprise asupport device with a receptacle, but instead utilize the piercingdevice in conjunction with straps and/or a side cover. In certainembodiments, the support device and cartridge are integral components,while in other embodiments, they may be separate components. In stillother embodiments, the fluid container may be integral to the supportdevice or pump engagement cartridge, and the system may not include apiercing device. For example, a fluid container may be integrally formedwith pump engagement cartridge 10 and comprise a port that can becoupled to conduit 13. Such a configuration could reduce the need toinclude a piercing device to assist in stabilization of the fluidcontainer, due to the fluid container being integrally formed with thepump engagement cartridge.

Certain embodiments may comprise a load cell to prevent the fluidcontainer from running empty and to provide an indicator of fluid level.

The claims are not intended to include, and should not be interpreted toinclude, means-plus- or step-plus-function limitations, unless such alimitation is explicitly recited in a given claim using the phrase(s)“means for” or “step for,” respectively. It will be understood that thebenefits and advantages described above may relate to one embodiment ormay relate to several embodiments. It will further be understood thatreference to ‘an’ item refers to one or more of those items.

The steps of the methods described herein may be carried out in anysuitable order, or simultaneously where appropriate.

Where appropriate, aspects of any of the examples described above may becombined with aspects of any of the other examples described to formfurther examples having comparable or different properties andaddressing the same or different problems.

It will be understood that the above description of preferredembodiments is given by way of example only and that variousmodifications may be made by those skilled in the art. The abovespecification, examples and data provide a complete description of thestructure and use of exemplary embodiments of the invention. Althoughvarious embodiments of the invention have been described above with acertain degree of particularity, or with reference to one or moreindividual embodiments, those skilled in the art could make numerousalterations to the disclosed embodiments without departing from thescope of this invention.

The invention claimed is:
 1. A cartridge for attachment to a fluiddelivery system, the cartridge comprising: a conduit comprising anoutlet connection and a pump component configured to be positionedbetween an actuator and the cartridge, wherein the pump component isadapted to engage the actuator to pump liquid from a liquid container tothe outlet connection; and a support device comprising a receptacleconfigured to receive the liquid container and to support the liquidcontainer, the receptacle formed by a pair of lateral extensionsextending from a base portion, each lateral extension having a curvedand tapered surface, each curved and tapered surface curving inwardlytowards the liquid container such that a large liquid container engageseach curved and tapered surface at a higher position within thereceptacle than a small liquid container, the base portion having aplanar surface substantially parallel to a longitudinal axis of theliquid container when the liquid container is received within thereceptacle; wherein the cartridge is detachable from the fluid deliverysystem.
 2. The cartridge according to claim 1, wherein the pumpcomponent is a flexible conduit which forms a peristaltic pump uponconnection to the fluid delivery system.
 3. The cartridge according toclaim 1, wherein the pump component is a diaphragm pump configured to beactuated by the actuator.
 4. The cartridge according to claim 1, whereinthe actuator is carried by the fluid delivery system.
 5. The cartridgeaccording to claim 1, wherein the actuator comprises a rotor to engagethe pump component to form a peristaltic pump.
 6. The cartridgeaccording to claim 1, wherein the pump component comprises a diaphragmpump, and wherein the actuator comprises a push/pull actuator.
 7. Thecartridge according to claim 1, wherein the receptacle is configured tosupport the liquid container at different locations within thereceptacle.
 8. The cartridge according to claim 1, wherein the pair oflateral extensions comprise a first lateral extension and a secondlateral extension, the first lateral extension and the second lateralextension extending from the base portion to form the receptacle,wherein the base portion further comprises a slot between the firstlateral extension and the second lateral extension.
 9. The cartridgeaccording to claim 1, further comprising a piercing device adapted topierce the liquid container and to provide fluid communication betweenthe liquid container and the conduit.
 10. The cartridge according toclaim 9, wherein the piercing device is configured to be attached to thesupport device such that the liquid container is pierced by the piercingdevice when the liquid container is placed in the support device. 11.The cartridge according to claim 9, the conduit further comprising: afirst coupling from the piercing device to the pump component; and asecond coupling from the pump component to the outlet connection. 12.The cartridge according to claim 11, wherein the pump component is aflexible conduit between the first and second couplings.
 13. Thecartridge according to claim 9, wherein the piercing device comprises avent valve.
 14. The cartridge according to claim 9, wherein the pair oflateral extensions comprise a first lateral extension and a secondlateral extension, the first lateral extension and the second lateralextension extending from the base portion to form the receptacle,wherein the base portion further comprises a slot between the firstlateral extension and the second lateral extension configured to engagea retaining member coupled to the piercing device.
 15. The cartridgeaccording to claim 14, wherein the retaining member comprises aplurality of flexible ribs that provide a positive engagement for afriction fit between the retaining member and the slot.
 16. Thecartridge according to claim 9, wherein the piercing device isconfigured to pierce the liquid container prior to the liquid containerengaging the receptacle.